是的，有，但我找不到更简单的方法。。。

在这里，我们正在更改Media 子菜单和反转Add new 和Library.

add_filter( \'custom_menu_order\', \'wpse_73006_submenu_order\' );

function wpse_73006_submenu_order( $menu_ord ) 
{
    global $submenu;

    // Enable the next line to inspect the $submenu values
    // echo \'<pre>\'.print_r($submenu,true).\'</pre>\';

    $arr = array();
    $arr[] = $submenu[\'upload.php\'][10];
    $arr[] = $submenu[\'upload.php\'][5];
    $submenu[\'upload.php\'] = $arr;

    return $menu_ord;
}